5.4 2003 faster than.......
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i have a 5.4 lariat super cab 4x4 with a k&n and exhaust with 3.55 gears and 33 inch tall tires. i use the trucks torqe to my advatage. i can beat a 1999 dodge r/t dakota with the 360, k&n, exhaust, and chip in the 1/8th mile by half a car lenght.
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From: irwin,pa
interesting- my truck is like yours 03 supercab 5.4 auto 3.55 i ran a 16.3 every dakota rt i've seen has run in the 15's you must have a factory freak!
by the way- i'm putting out over 300 hp at the crank
by the way- i'm putting out over 300 hp at the crank
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From: irwin,pa
time
Originally Posted by shey myers
i have a 5.4 lariat super cab 4x4 with a k&n and exhaust with 3.55 gears and 33 inch tall tires. i use the trucks torqe to my advatage. i can beat a 1999 dodge r/t dakota with the 360, k&n, exhaust, and chip in the 1/8th mile by half a car lenght.
with diablo chip i ran 16.7 @80.96-56 degrees- 1/4 tank of gas
with superchips9100 custom tuner ran 16.3's at 81.96-80 degrees ,full tank of gas
dyno with diablo- 220 rwhp@4300[hit limiter]
300 ftlbs tq-3800 rpms
dyno with custom tuner:
247rwhp @5100 rpms
331 ft lbs of tq at 3750 rpms
and i lost to a bone stock 99 rt dakota- 15.4's and you pull on em ????????????????????????????????????
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From: Homer, Alaska
Were the 3.55 gears what came stock with the 2003 F150's?
If not, how do I tell what my truck would have for stock gears? I have a 2003 F150 5.4L Supercrew with 265/70/17's, an automatic, if anyone knows what the stock gears come at, I'd like to know.
If not, how do I tell what my truck would have for stock gears? I have a 2003 F150 5.4L Supercrew with 265/70/17's, an automatic, if anyone knows what the stock gears come at, I'd like to know.
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From: irwin,pa
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From: South Kitsap County, WA
Rambo- Check your door jamb for the axle code... H9 or 19 are 3.55's, B6 or 26 are 3.73's. Check the tech section here at the site for a code cipher on others.
-Kerry
-Kerry
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From: Louisville,Ky.
The 2004 has 40 more hp, but it is a bigger, heavier truck. Plus the drive-by-wire system is designed more fore low end torque (pulling heavy loads) than quick acceleration. The 2004 has 15 more lb/ft of torque too, but the extra weight cancels out the difference, it just makes more torque at a lower rpm to get heavy loads moving easier.
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Both are "new factory" trucks, so miles aren't an issue. I simply overlooked the gear ratio's, I'll look each up to make double sure before I post them. Also I'll get tire sizes. I am NOT racing them, just wanted a general idea.
So far, in driving both, just seems the 2003 feels like it will smoke the 2004. Makes sense to me tho, since the 4x4 has the extra weight. The 2003 seems to have a better take off, and also it is real noticeable like from a 60 MPH punch down, that the 2003 starts and accelerates lots more.
I'll get back with the rest of the information.
So far, in driving both, just seems the 2003 feels like it will smoke the 2004. Makes sense to me tho, since the 4x4 has the extra weight. The 2003 seems to have a better take off, and also it is real noticeable like from a 60 MPH punch down, that the 2003 starts and accelerates lots more.
I'll get back with the rest of the information.
Last edited by ronxp2000; Apr 22, 2004 at 09:20 PM.
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2003 2wd Sport XLT 5.4 Super CAB has 3.55 limited slip axle with P275/60R-17 tires and 6300# GVWR pacakge
2004 4x4 Lariat 5.4 Super CREW has 3.73 limited slip axle with P275/65R-18 tires and 7200# GVWR package
so who wins in theory?
Also can someone explain how these gear numbers work? Like why you want higher, or lower, and for what reasons.
2004 4x4 Lariat 5.4 Super CREW has 3.73 limited slip axle with P275/65R-18 tires and 7200# GVWR package
so who wins in theory?
Also can someone explain how these gear numbers work? Like why you want higher, or lower, and for what reasons.
Last edited by ronxp2000; Apr 22, 2004 at 09:16 PM.
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From: Louisville,Ky.
The higher the number, the more torque multiplication.
The driveshaft turns 3.55 times for every tire rotation,or it turns 3.73 times per tire revolution.
Think in terms of a 10 speed bike. In 1, you can take off quick, but can't go too fast. In 10, it is hard to get moving, but you can go a lot faster.
The higher number ratio 3.73 will pull and accelerate a little quicker than a 3.55, but the 3.55 will get better mileage (a little) and have a bit more top end speed.
I personally have 3.55's in my 01 and wish that I would have gotten 3.73's but I am not going to spend the money to change both the front and rear gears.
The driveshaft turns 3.55 times for every tire rotation,or it turns 3.73 times per tire revolution.
Think in terms of a 10 speed bike. In 1, you can take off quick, but can't go too fast. In 10, it is hard to get moving, but you can go a lot faster.
The higher number ratio 3.73 will pull and accelerate a little quicker than a 3.55, but the 3.55 will get better mileage (a little) and have a bit more top end speed.
I personally have 3.55's in my 01 and wish that I would have gotten 3.73's but I am not going to spend the money to change both the front and rear gears.
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From: South Kitsap County, WA
I was trying to type basically what you wrote, Jimmy, but my fingers got stupid or my mind wandered... yeah a torque muliplier.... 
I'd call it a draw in a drag - the 3.73's and higher engine torque would help the '04 get started, but the 3.55's and lighter weight of the '03 would surpass any gains by the '04.
-Kerry
I'd call it a draw in a drag - the 3.73's and higher engine torque would help the '04 get started, but the 3.55's and lighter weight of the '03 would surpass any gains by the '04.
-Kerry
Last edited by kspilkinton; Apr 22, 2004 at 09:59 PM.